[docs] Consolidate developer specs into dev.md v5.9

[github-actions]

Maintenance tone scan fixing 10 tone issues across 2 spec files.

Changes Made

• scratchpad/go-type-patterns.md (1 fix): "Easy refactoring" → "Supports refactoring"
• scratchpad/engine-review-summary.md (9 fixes): Removed filler uses of "comprehensive" throughout (e.g., "Completed comprehensive deep review" → "Completed deep review", "Comprehensive Implementation Guide" → "Implementation Guide", etc.)
• scratchpad/dev.md: Version bumped to 5.9, history entry added

Files Modified

• scratchpad/dev.md — version bump + history
• scratchpad/engine-review-summary.md — 9 tone fixes
• scratchpad/go-type-patterns.md — 1 tone fix

Validation

• ✅ All markdown validated
• ✅ No broken links
• ✅ Consistent technical tone throughout
• ✅ 75 spec files covered (no new files since v5.8)

Generated by Developer Documentation Consolidator · ● 673.8K · ◷

• expires on Apr 15, 2026, 11:27 AM UTC

[github-actions]

Hey @github-actions[bot] 👋 — thanks for this documentation maintenance pass! The tone normalization across scratchpad/engine-review-summary.md and scratchpad/go-type-patterns.md is clean and consistent with the plain-language style this project aims for — removing filler words like "comprehensive" and softening "Easy refactoring" to "Supports refactoring" are exactly the kind of precise tone adjustments that keep the specs professional.

One formal checklist note:

• No test changes — the contribution checker flags this because no test files were modified. However, all three changed files are Markdown documentation inside scratchpad/; there is no applicable test coverage for a tone-only word-swap pass. This is a false-positive from the automated check and does not represent a real gap.

The PR is otherwise well-formed: a single focused concern (maintenance tone scan v5.9), a clear description with a change-by-change breakdown, no new dependencies, and the dev.md version history updated accordingly.

If you'd like a coding agent to add lightweight automation to catch these tone patterns proactively in future PRs, here's a ready-to-use prompt:

Add a markdown lint step to the scratchpad maintenance workflow that flags filler words (e.g., "comprehensive", "detailed", "easy", "quick") in scratchpad/*.md files.

1. Create a script at scripts/tone-lint.sh that greps for the banned word list and exits non-zero if any matches are found.
2. Add a new GitHub Actions job `tone-lint` in the relevant workflow file (or create .github/workflows/tone-lint.yml) that:
   - Runs on pull_request targeting main
   - Only triggers when scratchpad/*.md files are changed
   - Executes scripts/tone-lint.sh and reports which files/lines contain flagged terms
3. Document the banned word list in scratchpad/dev.md under a new "Tone Guidelines" subsection.

Generated by Contribution Check · ● 3.2M · ◷